Sala Sismica

Earthquake with magnitude of Mwp 6.2 on date 08-12-2017 and time 03:09:56 (Italy) in region Kermadec Islands, New Zealand [Sea: New Zealand]

A magnitude Mwp 6.2 earthquake occured in region: Kermadec Islands, New Zealand [Sea: New Zealand], on

  • 08-12-2017 02:09:56 (UTC)
  • 08-12-2017 03:09:56 (UTC +01:00) Italian time
  • 08-12-2017 15:09:56 (UTC +13:00) local time in the region of the earthquake (Pacific/Auckland)

and geographic coordinates (lat, lon) -30.86, -178.11 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 inhabitants.

Recent and historical Seismicity
Seismic hazard
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire ( that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 mb 5.2
Mwp 6.2

Mwpd 6.3
-30.86 -178.11 10 2017-12-08
Sala Sismica INGV-Roma 52421131
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2017-12-08 02:09:56
Latitude -30.86
Longitude -178.11
Depth (km) 10 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 52421131


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 57944
Semi-minor axis of confidence ellipse (meter) 8282
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 266
Circular confidence region, given by single value of horizontal uncertainty (meter) 46770.9
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 180.289
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 2.67413
Epicentral distance of station closest to the epicenter (degree) 1.62236
Epicentral distance of station farthest from the epicenter (degree) 56.01213
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information


Field Value
Value 6.3
Uncertainty 0
Num. used stations 7
Type of magnitude Mwpd
Reference to an origin 52421131
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-12-08 02:27:07


Field Value
Value 6.2
Uncertainty 0.1
Num. used stations 11
Type of magnitude Mwp
Reference to an origin 52421131
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-12-08 02:27:07


Field Value
Value 5.2
Uncertainty 0.1
Num. used stations 12
Type of magnitude mb
Reference to an origin 52421131
Agency INGV
Autore Auto added
Time of creation (UTC) 2017-12-08 02:27:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IU.CASY.BHZ.00 2017-12-08T02:24:17.32 10.0 positive automatic ScP 208 54.5476 -6.21213 0
IU.MBWA.BHZ.00 2017-12-08T02:19:32.82 10.0 positive automatic P 264 56.0121 -0.969773 0.349687
AU.MTN.BHZ. 2017-12-08T02:18:47.65 10.0 positive automatic P 279 49.9491 -1.40299 0.541942
AU.KDU.BHZ. 2017-12-08T02:18:39.55 10.0 positive automatic P 280 48.8943 -1.43026 0.546575
GT.VNDA.BHZ.00 2017-12-08T02:18:34.63 10.0 positive automatic P 186 47.5338 4.1444 0.623928
AU.WRKA.BHZ. 2017-12-08T02:18:26.85 10.0 positive automatic P 263 47.2599 -1.58164 0.585946
AU.FORT.BHZ. 2017-12-08T02:18:15.95 10.0 negative automatic P 256 45.7547 -0.596925 0.632904
AU.HTT.BHZ. 2017-12-08T02:16:58.75 10.0 negative automatic P 254 36.2164 0.663872 0.775853
IU.CTAO.BHZ.00 2017-12-08T02:16:36.37 10.0 negative automatic P 280 33.7577 -0.434477 0.852221
AU.ARMA.BHZ. 2017-12-08T02:15:32.00 10.0 negative automatic P 263 25.9616 5.17498 0.869565
ND.KOUNC.BHZ.00 2017-12-08T02:14:13.79 10.0 positive automatic P 299 18.8792 -1.63249 0.701754
G.DZM.BHZ.00 2017-12-08T02:13:43.70 10.0 negative automatic P 299 16.359 -1.15533 0.888889
ND.ONTNC.BHZ.00 2017-12-08T02:13:42.10 10.0 negative automatic P 298 16.2148 -0.774117 0.888889
NZ.URZ.HHZ.10 2017-12-08T02:11:57.32 10.0 positive automatic P 207 8.3801 0.821791 0.980392
NZ.OUZ.HHZ.10 2017-12-08T02:11:55.26 10.0 positive automatic P 236 8.2049 1.17629 0.961538
IU.RAO.BHZ.00 2017-12-08T02:10:20.32 10.0 negative automatic P 5 1.6224 -3.31594 0.941176
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download